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https://github.com/octoleo/syncthing.git
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69 lines
1.5 KiB
Go
69 lines
1.5 KiB
Go
// Copyright (C) 2015 The Syncthing Authors.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at https://mozilla.org/MPL/2.0/.
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package discover
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import (
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stdsync "sync"
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"time"
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"github.com/thejerf/suture"
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"github.com/syncthing/syncthing/lib/protocol"
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)
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// A cachedFinder is a Finder with associated cache timeouts.
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type cachedFinder struct {
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Finder
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cacheTime time.Duration
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negCacheTime time.Duration
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cache *cache
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token *suture.ServiceToken
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}
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// An error may implement cachedError, in which case it will be interrogated
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// to see how long we should cache the error. This overrides the default
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// negative cache time.
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type cachedError interface {
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CacheFor() time.Duration
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}
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// A cache can be embedded wherever useful
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type cache struct {
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entries map[protocol.DeviceID]CacheEntry
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mut stdsync.Mutex
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}
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func newCache() *cache {
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return &cache{
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entries: make(map[protocol.DeviceID]CacheEntry),
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}
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}
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func (c *cache) Set(id protocol.DeviceID, ce CacheEntry) {
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c.mut.Lock()
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c.entries[id] = ce
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c.mut.Unlock()
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}
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func (c *cache) Get(id protocol.DeviceID) (CacheEntry, bool) {
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c.mut.Lock()
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ce, ok := c.entries[id]
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c.mut.Unlock()
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return ce, ok
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}
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func (c *cache) Cache() map[protocol.DeviceID]CacheEntry {
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c.mut.Lock()
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m := make(map[protocol.DeviceID]CacheEntry, len(c.entries))
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for k, v := range c.entries {
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m[k] = v
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}
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c.mut.Unlock()
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return m
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}
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